Studying The Expression of Human P53 Gene in Patients Carrying Breast Cancer.

Dawood S. Edan


The gene P53 can activate DNA repair proteins when DNA has sustained damage. So, it is an important factor in aging. Also, P53 gene can also be modified by mutagens (chemicals, radiation, or viruses), increasing the likelihood for uncontrolled cell division. For this importance, we collected thirty samples from Yarmouk hospital in Baghdad, Iraq.
Twenty-nine from women patients carrying breast cancer and the last one was from healthy woman, and the samples that we have taken were embedded in paraffin wax. The extracted RNA from each samples was used to check the expression of a suppressor gene (P53) via Real time PCR. We designed primers of P53 gene on encoded sequence (Exon), to make sure generation a specific PCR product of P53 gene by converting mRNA to cDNA then PCR Product. The expression of each samples was fluctuated between 0.1 fold to 0.2 fold compared with the control (the healthy sample). The highest expression showed was samples 7 (0.2 fold), and the lowest expression showed was samples 27 (0.1 fold) that compared with control expression (sample 19). While the control expression was the highest (0.25 fold) among all samples.
The results indicate that tumor may affects on a suppressor gene (P53) and can decrease the gene expression, and eventually can decrease the P53 suppressor protein that can be used it in the cell protection against cancer.


P53 gene, Gene expression, Breast cancer.

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